New, non-adenosine, high-potency agonists for the human adenosine A2B receptor with an improved selectivity profile compared to the reference agonist N-ethylcarboxamidoadenosine

J Med Chem. 2004 Jul 15;47(15):3707-9. doi: 10.1021/jm049947s.

Abstract

The adenosine A(2B) receptor is the least well characterized of the four known adenosine receptor subtypes because of the absence of potent, selective agonists. Here, we present five non-adenosine agonists. Among them, 2-amino-4-(4-hydroxyphenyl)-6-(1H-imidazol-2-ylmethylsulfanyl)pyridine-3,5-dicarbonitrile, 17, LUF5834, is a high-efficacy partial agonist with EC(50) = 12 nM and 45-fold selectivity over the adenosine A(3) receptor but lacking selectivity versus the A(1) and A(2A) subtypes. Compound 18, LUF5835, the 3-hydroxyphenyl analogue, is a full agonist with EC(50) = 10 nM.

Publication types

  • Comparative Study

MeSH terms

  • Adenosine A2 Receptor Agonists*
  • Adenosine-5'-(N-ethylcarboxamide) / chemistry
  • Adenosine-5'-(N-ethylcarboxamide) / pharmacology*
  • Aminopyridines / chemical synthesis*
  • Aminopyridines / chemistry
  • Aminopyridines / pharmacology
  • Animals
  • CHO Cells
  • Cricetinae
  • Cyclic AMP / biosynthesis
  • Humans
  • Imidazoles / chemical synthesis*
  • Imidazoles / chemistry
  • Imidazoles / pharmacology
  • Structure-Activity Relationship

Substances

  • 2-amino-4-(4-hydroxyphenyl)-6-(1H-imidazol-2-ylmethylsulfanyl)pyridine-3,5-dicarbonitrile
  • Adenosine A2 Receptor Agonists
  • Aminopyridines
  • Imidazoles
  • Adenosine-5'-(N-ethylcarboxamide)
  • Cyclic AMP